These are all biographies of the supporting characters. If you want to contribute anything about some of the more minor characters, or want to add anything to the profiles already here, email me ^_^.
Rinoa Heartilly
Age: 17
Height: 5'3 1/2
Date of Birth: March 3
Blood Type: Unknown
Weapon: Blaster Edge
Limit Break: Combine (Angelo) and Angel Wing
History: Rinoa's parents - Julia Heartilly, a singer and pianist, and "General" Caraway, the head of Galbadia's army - met after Laguna was sent away by the Galbadian army. They got to know each other and married. Rinoa was born shortly after, but when she was four Julia died, leaving her with just her father. She disliked the fact that her father used violence and helped oppress innocent civilians, and she rebelled often, eventually running away to Timber, where she formed a resistance faction, called the Forest Owls, with two young men named Zone and Watts.
Personality: Rinoa has a very warm personality - generous, compassionate and optimistic. She enjoys life and acts according to her strong values. However, she has been sheltered from the real world for most of her life, so she sometimes has unrealistic expectations of others and how they should act during difficult situations. The positive traits outshine the negative, though, and through her kindness and understanding, she is the only person who gets through Squall's shell and opens his heart.
Seifer Almasy
Age: 18
Height: 6'2
Date of Birth: December 22
Blood Type: O
Weapon: Gunblade
Limit Break: Fire Cross
History: Seifer was raised in Matron's orphanage, along with Squall, Quistis, Selphie, and Irvine. His personality was the complete opposite of Squall's, and their conflicting personalities would lead them to fight over even the smallest things. When he was sent to Garden at the age of 10 (?), Seifer decided to master the gunblade, and thus insured that he and Squall would always have something to fight over. His domineering personality led him to become the head of the Disciplinary Committee, along with his "friends" Fujin and Raijin. He was a very gifted student, and took the SeeD test many times, though his temperamental personality caused him to fail every time. His lifelong dream is to become a SeeD, or at least any person who could serve someone. He also has a secret - and very dangerous - romantic dream...
Personality: As mentioned before, Seifer is the complete opposite of Squall. He's loud, rude, demanding, controlling, and hates authority. However, he has very strong self-confidence, a good sense of humor, a strong personality, and some of the best lines in the game ^_^. Though he fails every SeeD test he takes, he perseveres and keeps taking them, even if he doesn't follow the rules.
Quistis Trepe
Age: 18
Height: 5-6
Date of Birth: October 4
Blood Type: A
Weapon: Chain Whip
Limit Break: Blue Magic
History: Quistis didn't get along with her adoptive family and was sent to Balamb Garden at the age of 10. At 15, she graduated and was the youngest person ever to become a SeeD, and became a teacher at 17. Her lack of control over her students led to her dismissal a year later, though she was still allowed to stay at Garden as a SeeD.
While Quistis was growing up in the orphanage, she would constantly intervene in Squall and Seifer's fights, and after Ellone left, took over the role of the "big sister". Her protective feelings for Squall morphed into romantic feelings for him, and it was only years later that she finally realized that she hadn't really had a crush on him all those years (or did she...?).
Personality: Out of all the characters (besides Squall), I like Quistis' personality the best ^_^. She's complex - always "calm, cool, and in control", but at the same time showing signs of being very emotional under the surface. She's intelligent, witty and always keeps her emotions in check and never freaks out. However, throughout the game she's conflicted in her attraction to Squall ("a misunderstood love?"), and doubts her own worth and importance. She has the most realistic personality, in my opinion.
Zell Dincht
Age: 17
Height: 5'5
Date of Birth: March 17
Blood Type: B
Weapon: Glove
Limit Break: Duel
History: Zell grew up - big surprise - in the orphanage. He was adopted by the Dinchts in Balamb, and entered the Garden when he was 13. Having forgotten that he was adopted, he idolized his family members, especially his grandfather.
Personality: Much like Seifer, Zell is loud and brash, and will jump into any situation without really thinking it through. However, he is also kind, friendly and sensitive - a quality which Seifer routinely exploits (he doesn't take teasing too well). He loves to eat, especially hotdogs, and loves to get into the workings of mechanisms and equipment.
Selphie Tilmitt
Age: 17
Height: 5'1 1/2
Date of Birth: July 16
Blood Type: B
Weapon: Nunchaku
Limit Break: Slot
History: Unlike Squall, Seifer and Quistis, Selphie was sent not to Balamb, but Trabia Garden. She enjoyed herself greatly there, but had to transfer to Balamb Garden to take the SeeD exams.
Personality: Selphie is the polar opposite of Squall - spunky, energetic (maybe too much so...), and outgoing. She appears to be innocent and a bit naive, but really is quite aware of the things going on around her. She approaches every situation enthusiastically and optimistically, even the more negative ones. For example, when the missile hit Trabia Garden and she went to her friends' graves, she vowed to avenge them.
Irvine Kinneas
Age: 17
Height: 6'0
Date of Birth: November 24
Blood Type: A
Weapon: Gun
Limit Break: Shot
History: Irvine was raised in the orphanage as well, but unlike the others, he never used GFs, so he never lost his memories. After the orphanage he was sent to Galbadia Garden, where he (apparently) became a highly esteemed sharpshooter.
Personality: At times, Irvine comes off as a weird surfer dude - cowboy person (he says things like "like" in the middle of sentences and stuff). When we first meet him, he comes off as flirtatious and boisterous, but we soon learn that it's a cover up for his true insecure and sensitive nature. Irvine was obviously the most traumatized by his parent's deaths, and harbors a deep belief in fate and destiny.
Laguna Loire
Age: 27
Height: 5'9
Date of Birth: January 3
Blood Type: B
Weapon: Machine Gun
Limit Break: Desperado
History: This is a long one...
For many years, Laguna loved to write. After a (presumably) uneventful childhood, he joined the army at 27. He would frequently stop in Deling City to listen to Julia, a famous pianist, play. One night she invited him to her room to "talk" (uhuh), but their meeting was interrupted when Laguna was ordered to go on another mission. Julia waited for Laguna to return, but he never did, and she wrote a song about him in memory.
Meanwhile, Laguna was seriously injured after jumping off a cliff next to the Lunatic Pandora, but was nursed back to health by a woman named Raine, who lived in a sleepy town by the name of Winhill. Raine had adopted a young girl named Ellone, who would often play with him. As Laguna got better, he fell in love with Raine, Ellone and Winhill itself. He and Raine got married, and Raine got pregnant.
But one day Adel, the ruler of Esthar, sent forces to capture Ellone (Ellone had a special time-traveling ability that she wanted), and Laguna left Winhill to find her. During the trip to Esthar, Laguna traveled to many places and wrote articles about them for the magazine "Timber Maniacs".
When he finally got to Esthar, he managed to free Ellone and imprison Adel in a glass case, thus ending her reign. The ecstatic people of Esthar made him president. He sent Ellone back to Winhill and led Esthar.
Meanwhile in Winhill, Raine died giving birth to a baby boy (Squall), and Laguna placed them in the care of Cid and Edea Kramer.
Laguna continued to govern Esthar, though with much guilt and sadness.
Cid and Edea Kramer
Age: ?
Height: ?
Date of Birth: ?
Blood Type: ?
Weapon (Edea): Magic
Limit Break (Edea): Ice Strike
History: When Edea was a young girl, she inherited powers from a dying witch, thus becoming a sorceress. Years later, she married Cid Kramer, and they set up an orphanage for the children of all the victims of the First Sorceress War. One day (?), the Sorceress Ultimecia (from the future) came to the orphanage, looking for someone to pass on her powers to before she passed away. To stop her powers from passing to any of the children, Edea took them. Aware that she might be possessed at any time, Edea and Cid started making Gardens, schools to train people to kill threatening sorceresses. However, Edea was possessed, and Cid was left alone.
Personality: Well, I should say personalities. Edea and Cid are both very caring deep down, and would not be afraid to sacrifice themselves - or each other - for the good of everyone. Cid is a good leader (well, when he doesn't hand things over to Squall), inspiring, and brave in that he keeps on going without his wife, and even orders attacks on her. When she is not possessed by Ultimecia, Edea is a very "motherly" character - warm, gentle, and kind.